There are more than 400000 apps in the Android Market. You don't need every one of them, but you do need to download these 10 .With almost 51 per cent of the global smartphone market, Android is far and away the most popular smartphone operating system in the world.AirSync I assume is much like AirDroid.

if you're a sports guy definitely WatchESPN and Scorecenter.
I only bank now via mobile - so any bank app is phenomenal
if you live in NYC - there's this app called UBER. it's a little more expensive than a cab. but sends a car service to you within minutes. no tip. straight off your CC. great for trying to impress a date.

also, just stumbled upon PlanetPron. which is a pron app for the android with great pics and vids. no malware detected and is very smooth to use. you can also hide the icon, so people going through your phone won't know what it is. password protected too.

The best Android apps are getting harder to find in the crowded Android.With almost 51 per cent of the global smartphone market, Android is far and away the most popular smartphone operating system in the world.

You forgot to add Titanium Backup PRO it is a really useful and must have app for android and for me SuperUser and OfficeSuite Pro I always use this app whenever I forgot something to fix in my files and you better try also NewsAce Multimedia News Reader if you love podcast and love to read news while watching it plays in a newspaper style.

Personal opinion, this is a list of Android apps that you should have on your Android device. Of course, there are hundreds of thousands of apps in Google Play, if you like any others and think they are "must-have apps", free to leave a comment below.1. DropboxEveryone knows what Dropbox is and if you don’t you should get it. Cloud storage for all your devices so you can access files from anywhere, on any of your devices. An extremely helpful app that is free and uses someone Else’s storage space.2. AirDroidTransfer just about anything you can think back and forth between PC and your device over Wi-Fi with AirDroid. As well as that you can send messages, update contacts, change ringtones and control most things you would want to from your computer, all through a web-based interface.3. SMS Backup and RestoreIf you are an Android User who has a rooted device and tests out new Roms regularly, but wish to keep your SMS messages on your phone, or maybe if you are just a bit of a paranoid parrot, then SMS Backup and Restore is an app for you.4. MoboroboDon’t waste the seconds it takes to open up your browser and type in moborobo.com. Moborobo is a leading Android Smartphone Management Software that can be installed on your Windows PC. With Moborobo, the management of your Android Smartphone becomes fun and easy. Manage contact data: Sort, find, organize and backup your contact data, such as your contact list as well as your messages. You can create groups for your contacts and import/export them between your pc and your device.5. PocketPocket is an Android app that allows you to save web content to view later. Saving the content within the Pocket Android App, you can view it at your leisure at any time on your Android device, or even send the list to an email to be accessible from wherever you like.6. Google MapsGoogle Maps is one of the most useful apps available for Android. Plot courses, get guided towards your destination or just look for better paths. Google Maps is an excellent GPS navigation tool for Android users.7. WikipediaOpen up your browser and type in Wikipedia.com. Open the Android app and type in your search that is sure to deliver you with the best Wikipedia results for your search terms. Provides all Wikipedia function so get it now.8. Angry Birds(multiple incarnations)It seems like everyone in the world has or have had a go at Angry Birds. Don’t get left behind as someone who hasn’t experienced it. Plus, it’s a great time waster for those periods of utter boredom. A new version with new game mechanics is released every now and then, so the fun will never run out with Angry Birds.9. Go Launcher EXGo Launcher EX might not be as fancy looking as some of the launchers that specialize in animations and cool effects, but I dare say it's more functional than many of them. My own reason for using it has a lot to do with the widgets, both in terms of functionality and the ability to make them look the same.

Well, those are my own favour. Sure, not everyone will enjoy all of these apps.You can provide what you are interested in. Or if you like the list of apps, you can have a try!

I thinkit's very good collection. I don't think that it's must have, but collection is good.

I would also like to add some apps for shopping : like The Coupons App, Groupon, Google Offers, GeoQpons, TapSave, if you shop with these, you will save some money, if you are interested in these apps, you can click android shopping apps to view this post, it gets description on how to use the apps and provides download links or you can search these apps name at google play store to download.